Background

China has made substantial progress in tackling its HIV and AIDS epidemic. But the changing patterns of HIV and AIDS incidence based on the longitudinal observation data were rarely studied.

Methods

The reporting incidence (RI) and mortality data on HIV and AIDS in China covering 31 provinces from 2004 to 2014 were collected from the Chinese Public Health Science Data Center. To decompose the time-series data, Empirical Mode Decomposition (EMD) was applied to properly describe the trends of HIV and AIDS incidence. A mathematical model was used to estimate the relative change of incidence among provinces and age groups.

Results

A total of 483,010 newly HIV infections and 214,205 AIDS cases were reported between 2004 and 2014 nationwide. HIV infection increased from 13,258 in 2004 (RI 1.02 per 100,000 person years) to 74,048 in 2014 (RI 5.46 per 100,000). The number of AIDS cases increased from 3054 in 2004 (RI 0.23 per 100,000) to 45,145 in 2014 (RI 3.33 per 100,000). The overall relative changes for HIV infection and AIDS incidence were 1.11 (95% confidence interval [CI] 1.10–1.13) and 1.28 (95% CI 1.23–1.33), respectively. The relative increase for HIV and AIDS RI was higher in northwest provinces while lower in Henan, Xinjiang, Guangxi and Yunnan. The overall relative changes for HIV infection were 1.12 (95% CI 1.11–1.14) in males and 1.10 (95% CI 1.06–1.13) in females. For AIDS RI, the relative increases were 1.31 (95% CI 1.26–1.36) in males and 1.22 (95% CI 1.17–1.28) in females. The lowest relative increase was detected among young adults, while the largest relative increase (odds ratio [OR] > 1.30) was detected in people aged 55 years or above.

Conclusions

HIV and AIDS showed an increasing trend in China from 2004 to 2014, respectively, but the epidemic tended to be under control among provinces and young people that used to have a high HIV and AIDS incidence. Northwest China and older people could be new “hop-spots” for HIV and AIDS risk.

Although great efforts have been made by Chinese government over the last three decades, HIV and AIDS remains an important public health concern in China [1, 2]. In 2014, more than half a million people living with HIV and 0.2 million AIDS cases were reported, and there were more than 0.1 million new HIV infections [3]. Since the first AIDS case was reported in early 1980’s, China had initiated a set of measures to combat this emerging health problem. HIV and AIDS surveillance started in 1985. In 1995, the China Ministry of Health and the National Center for AIDS established 42 national sentinel sites in 23 of the 31 provinces [4]. However, the system had issues related to its accessibility and accuracy, which hampered timely understanding of the HIV and AIDS epidemic pattern and effectiveness of HIV and AIDS prevention measures.

The outbreak of severe acute respiratory syndromes (SARS) in 2003 revealed some shortcomings of China’s infectious disease prevention system and triggered a rapid mobilization of public health policies for a broader range of health challenges. In particular, the HIV response has been strengthened by an influx of new funds and political support such as the “Four Free and One Care” policy [5]. A web-based HIV reporting system was established in 2005 and integrated the HIV and AIDS surveillance system [6], which provides a unique opportunity to comprehensively understand the epidemiological features of HIV and AIDS in China.

According to a recent study based on data collected from a routine infectious disease reporting system, ~ 20% (10/45) infectious diseases showed a significantly increasing trend in incidence from 2004 to 2013. HIV infection showed the fastest growth with annual percentage change of 16.3% in reporting incidence [7], but the study did not provide province-specific and age-specific results.

To better understand the epidemiological characteristics of HIV and AIDS in China, we used the surveillance data, by province, sex, and age, to determine the temporal trend of HIV and AIDS incidence in the country from 2004 to 2014, and the changing patterns of HIV and AIDS incidence across provinces and age groups. Moreover, we collected the mortality data to assess the HIV and AIDS disease burden in the same period. All these will assist evidence-based and region-specific planning and evaluation of the effectiveness of current treatment and prevention strategies, as well as the assessment of future tendency and subsequent allocation of limited health resources.

Data collection

A routine reporting system for selected infectious diseases covered 31 provinces in mainland China was established by the Chinese government in 1950s [8]. It has become a web-based system since 2003. The number of notifiable infectious diseases in this system increased from 18 before 1978 to 39 after 2003. The notifiable infectious diseases were divided into Classes A, B and C. According to the Infectious Disease Prevention Act, all epidemic reports are time-sensitive. All Class A infectious diseases as well as pulmonary anthrax and SARS in Class B should be reported through the system within 2 h after diagnosis, and other disease in Class B and Class C infectious diseases should be reported within 24 h after diagnosis. As a result, the date of diagnosis and reporting is the same day. We extracted HIV and AIDS data from 2004 and 2014 from the Science Data Center of Public Health (http://www.phsciencedata.cn). AIDS patients in our study were those who had a previous HIV diagnosis, which had been identified or not, and then progressed to late stage.

Statistical analysis

Incident trend decomposition

Empirical mode decomposition (EMD), an adaptive model for non-liner and non-stationary time series data [9], was used to identify the temporal trend of HIV and AIDS incidence from 2004 to 2014. The EMD method decomposed original data into several oscillatory components, corresponding to some physical phenomenon underlying the data, and the residue of decomposition is the unbiased surrogate of the true trend of the data [10]. The physical phenomenon varied across different scenarios and therefore hardly to be specified here. For example, if the data were time series of HIV incidence, the physical phenomenon included the effect size of infected people, the using rate of condom, and the HIV/AIDS polices etc.

Patterns of time changes in incidence and mortality of HIV and AIDS

In order to investigate the changing patterns of HIV and AIDS epidemic and to specify a mathematical model that allows comparisons among sexes, different provinces and age groups [11], we processed the original incidence and mortality data with a logit transformation and then assessed secular changes via polynomial and spline models (in our surveillance system, the incidence and mortality rate was calculated by population as denominator). As linear trends were observed in most provinces and age groups, a linear model was applied for incidence data on the logit scale. Relative changes in HIV and AIDS incidence or mortality were presented by odds ratio (OR) as compared with 2004. In addition, we also calculated average annual percentage change (AAPC) in HIV and AIDS RIs [12]. All analyses were conducted using R (version 3.3.3).

In the current analysis, “HIV infection” referred to the presence of HIV infection at the time of reporting. “AIDS” cases were newly diagnosed AIDS patients.

Temporal trends of HIV and AIDS incidence

During the period of 2004–2014, a total of 483,010 newly HIV infections and 214,205 AIDS cases were reported nationwide. Reported HIV infection cases increased from 13,258 in 2004 (RI: 1.02 per 100,000) to 74,048 in 2014 (RI = 5.46 per 100,000). Reported AIDS cases increased from 3054 in 2004 (RI = 0.23 per 100,000) to 45,145 in 2014 (RI = 3.33 per 100,000). The overall relative changes in incidence measured by OR were 1.11 (95% CI 1.10–1.13) for HIV and 1.28 (95% CI 1.23–1.33) for AIDS, respectively. The increase for HIV infection incidence was in a linear fashion. For AIDS incidence, the linear increase was smaller for the period of 2004–2009, with a relative change of 1.06 (95% CI 1.03–1.09), it was larger between 2010 and 2013, with a relative change of 1.44 (95% CI 1.37–1.50). The incidence of reported AIDS was plateaued in 2014 (Fig. 1).

Fig. 1

Monthly incidence of HIV and AIDS in China from 2004 to 2014. The gray smooth lines plotted in Fig. 1 were obtained from residues of EMD. (a: HIV monthly incidence from Jan, 2004 to Dec, 2014; b: AIDS monthly incidence from Jan, 2004 to Dec, 2014)

Changing patterns of HIV and AIDS incidence according to each province

The distributions of HIV infection and AIDS varied geographically in China (Fig. 2; Figs. 1 and 2 in Appendix). An increasing trend for both HIV infection and AIDS RIs was observed in all provinces from 2004 to 2014 (OR > 1.00) (Table 1; Fig. 3). In 2004, four provinces including Yunnan, Guangxi, Xinjiang and Henan, had the highest HIV incidence, and accounted for 56.1% of all newly HIV infections (Fig. 2), with the ORs being 1.13 (95% CI 1.09–1.16), 1.06 (95% CI 1.03–1.08), 1.03 (95% CI 1.01–1.05) and 1.06 (95% CI 1.02–1.10), respectively. In 2014, four provinces with the highest HIV incidence were Xinjiang, Yunnan, Sichuan (OR = 1.21, 95% CI 1.15–1.28) and Chongqing (OR = 1.20, 95% CI 1.16–1.25), and the incidence was all above 14.0 per 100,000. The highest relative increase in the incidence of HIV infection occurred in Shaanxi (OR = 1.40, 95% CI 1.33–1.47), Qinghai (OR = 1.41, 95% CI 1.33–1.49) and Inner Mongolia (OR = 1.38, 95% CI 1.33–1.44), which were all located in North and Northwest China.

Fig. 2

The distribution of HIV and AIDS cases by province in 2004 and 2014

Table 1

The relative change of HIV and AIDS incidence in each province in China from 2004 to 2014

In 2004, Henan, Guangxi, Yunnan and Beijing had the top 4 AIDS incidence rates (Fig. 1 in Appendix). Henan was the only province where AIDS incidence exceeded 1.0 per 100,000 from 2004 to 2014, but had the lowest relative increase (OR = 1.03, 95%CI 1.01–1.05). In 2014, Guangxi, Yunnan, Chongqing and Sichuan, all in Southwest China, had the highest AIDS incidence rates (Fig. 2; Fig. 1 in Appendix). Sichuan had the largest relative increase (OR = 1.64, 95% CI 1.54–1.75), followed by Guizhou (OR = 1.63, 95% CI 1.46–1.82) and Chongqing (OR = 1.62, 95% CI 1.54–1.70), which were all in Southwest China (Table 1; Fig. 3).

Changing patterns of HIV and AIDS incidence stratified by age

The age-specific incidences of HIV infection and AIDS changed over time. In 2004, adults aged 25–34 years accounted for 36.04% of all new HIV infections and 54.78% of all new diagnosed AIDS cases. In 2014, the corresponding proportions were 22.58 and 30.69%, respectively. However, the numbers of newly infected HIV and diagnosed AIDS cases unexpectedly increased among people aged 55 years or above between 2004 and 2014 (Fig. 4). In order to further investigate the HIV and AIDS changing patterns associated with age, we divided age into 18 groups stratified by gender.

Fig. 4

The distribution of HIV and AIDS cases by age in 2004 and 2014

The overall relative changes of reported HIV incidence among males and females were 1.12 (95% CI 1.11–1.14) and 1.10 (95% CI 1.06–1.13), respectively. Males and females had a similar changing pattern of HIV incidence (Table 2). Most age groups experienced an increase in HIV infection from 2004 to 2014 (Fig. 5).

Table 2

The relative change of HIV incidence in different age group in China from 2004 to 2014

Age group

Relative Change

Male

Relative Change

Female

Relative Change

HIV incidence in 2004 (/10^5)

OR

95%CI

HIV incidence in 2004 (/10^5)

OR

95%CI

HIV incidence in 2004 (/10^5)

OR

95%CI

All

0.99

1.12

1.10

1.13

1.46

1.12

1.11

1.14

0.51

1.10

1.06

1.13

0-

0.15

1.07

1.01

1.12

0.16

1.06

1.01

1.10

0.14

1.07

1.01

1.14

5-

0.08

1.10

1.05

1.15

0.09

1.09

1.04

1.14

0.06

1.11

1.04

1.17

10-

0.06

1.04

0.99

1.08

0.07

1.00

0.95

1.06

0.04

1.10

1.06

1.14

15-

0.38

1.18

1.16

1.20

0.45

1.23

1.19

1.26

0.29

1.09

1.06

1.12

20-

1.33

1.12

1.10

1.14

1.88

1.17

1.15

1.19

0.76

1.02

0.97

1.08

25-

2.86

1.07

1.05

1.08

4.35

1.08

1.06

1.10

1.36

1.03

0.99

1.07

30-

3.21

1.02

1.01

1.04

5.02

1.02

1.00

1.05

1.33

1.03

0.99

1.06

35-

1.84

1.06

1.04

1.08

2.81

1.06

1.04

1.07

0.81

1.08

1.03

1.13

40-

1.02

1.14

1.12

1.17

1.49

1.14

1.12

1.16

0.52

1.16

1.12

1.19

45-

0.62

1.26

1.22

1.29

0.91

1.25

1.22

1.28

0.32

1.29

1.24

1.33

50-

0.55

1.25

1.22

1.28

0.67

1.26

1.23

1.29

0.41

1.24

1.21

1.26

55-

0.23

1.33

1.28

1.38

0.28

1.33

1.28

1.38

0.19

1.34

1.29

1.39

60-

0.17

1.37

1.31

1.43

0.24

1.35

1.30

1.40

0.10

1.42

1.34

1.50

65-

0.18

1.38

1.31

1.46

0.28

1.38

1.30

1.47

0.06

1.38

1.32

1.45

70-

0.12

1.37

1.29

1.45

0.20

1.36

1.29

1.44

0.04

1.40

1.31

1.51

75-

0.07

1.41

1.30

1.52

0.13

1.40

1.30

1.51

0.02

1.50

1.32

1.70

80-

0.04

1.42

1.32

1.54

0.07

1.42

1.32

1.53

0.01

1.49

1.32

1.68

85-

0.25

1.17

1.01

1.36

0.56

1.22

1.07

1.38

0.06

1.00

0.96

1.02

Fig. 5

The relative change (odds ratio) of HIV and AIDS incidence in each age group stratified by gender from 2004 to 2014. (※: p < 0.05)

In males, the highest incidence of HIV infection in 2004 was found in people aged 30–34 years (5.02 per 100,000), but the relative increase was low (OR = 1.02, 95% CI 1.00–1.05, p = 0.027). The largest relative increase was observed in men aged 80–84 (OR = 1.42, 95% CI 1.32–1.53), albeit the lowest incidence in 2004 (0.07 per 100,000). The highest incidence of HIV infection in 2004 was found in women aged 25–29 years (1.36 per 100,000), but the incidence remained stable in the study period (OR = 1.03, 95% CI 0.99–1.07). The highest relative increase was detected in women aged 75–79 (OR = 1.50, 95% CI 1.32–1.70) with the HIV infection incidence being 0.02 per 100,000 in 2004.

For AIDS incidence, the relative increases in males and females were 1.31 (95% CI 1.26–1.36) and 1.22 (95% CI 1.17–1.28), respectively (Table 3; Fig. 5). All age groups except the age group of 10–14 years showed an increasing trend. In 2004, the highest AIDS incidence was found in people aged 30–34 years in both genders, but the relative increase was low for both males (OR = 1.23, 95% CI 1.16–1.29) and females (OR = 1.16, 95% CI 1.11–1.23). The largest relative increase was observed in older people (age ≥ 55 years) for both sexes. In males, the largest OR was observed in the age group of 80–84 years (OR = 1.57, 95% CI 1.48–1.67). In females, the largest OR was detected in the age group of 70–74 years (OR = 1.49, 95% CI 1.41–1.58).

Table 3

The relative change of AIDS incidence in different age group in China from 2004 to 2014

Age group

Both sex

Relative Change

Male

Relative Change

Female

Relative Change

AIDS incidence in 2004 (/10^5)

OR

95%CI

AIDS incidence in 2004 (/10^5)

OR

95%CI

AIDS incidence in 2004 (/10^5)

OR

95%CI

All

0.23

1.28

1.23

1.34

0.29

1.31

1.26

1.36

0.16

1.22

1.17

1.28

0-

0.04

1.15

1.06

1.25

0.05

1.14

1.05

1.23

0.02

1.17

1.08

1.27

5-

0.04

1.12

1.07

1.18

0.05

1.12

1.06

1.18

0.03

1.12

1.05

1.20

10-

0.03

0.96

0.89

1.04

0.03

0.92

0.85

0.99

0.02

1.03

0.94

1.14

15-

0.02

1.35

1.24

1.47

0.02

1.39

1.28

1.50

0.01

1.30

1.18

1.43

20-

0.10

1.38

1.29

1.47

0.11

1.47

1.35

1.59

0.08

1.26

1.18

1.34

25-

0.39

1.27

1.19

1.35

0.54

1.30

1.20

1.40

0.24

1.21

1.14

1.28

30-

0.65

1.21

1.15

1.27

0.88

1.23

1.16

1.29

0.41

1.16

1.11

1.23

35-

0.51

1.22

1.17

1.27

0.64

1.24

1.20

1.29

0.38

1.15

1.10

1.20

40-

0.40

1.26

1.22

1.30

0.48

1.29

1.25

1.33

0.32

1.19

1.15

1.24

45-

0.25

1.36

1.32

1.40

0.31

1.38

1.34

1.42

0.19

1.30

1.25

1.35

50-

0.27

1.29

1.25

1.32

0.33

1.32

1.29

1.35

0.20

1.22

1.17

1.27

55-

0.13

1.38

1.34

1.43

0.17

1.40

1.35

1.45

0.09

1.35

1.30

1.40

60-

0.12

1.44

1.37

1.51

0.16

1.46

1.38

1.53

0.06

1.40

1.33

1.48

65-

0.08

1.47

1.41

1.53

0.13

1.48

1.42

1.55

0.02

1.43

1.37

1.49

70-

0.07

1.50

1.41

1.60

0.12

1.50

1.41

1.61

0.01

1.49

1.41

1.58

75-

0.03

1.54

1.44

1.64

0.05

1.56

1.46

1.66

0.01

1.42

1.31

1.54

80-

0.01

1.58

1.49

1.68

0.02

1.57

1.48

1.67

0.00

1.12

1.06

1.18

85-

0.01

1.45

1.31

1.60

0.04

1.45

1.32

1.58

0.00

1.05

1.02

1.10

Changing patterns of HIV and AIDS mortality

Overall, the mortality rate for HIV and AIDS in China was increasing (Fig. 3 and Table 1 in Appendix). The relative increase was 1.29 (95% CI 1.18–1.40) nationwide. Geographically, the largest OR was found in Xinjiang (OR = 1.64, 95% CI 1.37–1.97). Henan was the only province where HIV and AIDS mortality remained stable from 2004 to 2014 (OR = 1.07, 95% CI 0.96–1.19). Moreover, HIV and AIDS mortality showed an increasing trend among all age groups except for the age group of 20–24 years in both genders (Table 2 in Appendix).

The results of AAPC were presented in Tables 3, 4, 5 and 6 in Appendix. No significant difference was detected.

Since the first report of HIV and AIDS case in China, the HIV and AIDS epidemic has been changing both geographically and temporally [13–19]. In this study, we provided a comprehensive overview of HIV and AIDS epidemic in China, and assessed secular changes among provinces and age groups for the period of 2004–2014. The lowest relative increase of HIV and AIDS incidence was detected in provinces with a high HIV and AIDS incidence in 2004. Some Northwestern provinces such as Qinghai and Shaanxi had the strongest relative increase of HIV and AIDS incidence. In addition, young men and women aged 20–34 years who had the highest HIV and AIDS incidence in 2004 experienced the lowest relative increase during the study period. Older men and women (age ≥ 55 years) showed the largest increase of HIV and AIDS incidence.

The HIV and AIDS surveillance/reporting system has been improving, which may explain part of the observed increases of HIV and AIDS incidence and mortality. China has more than 1800 sentinel sites for HIV and AIDS surveillance [15]. The counseling and testing services have been continuously strengthened. By the end of 2014, there were 455 HIV testing and confirmation labs and 25,762 screening labs in China, covering 96.5% of the country [20], and 21,210 medical and health institutions conducted ~ 130 million person-times of HIV antibody tests, increasing from 84 million in 2011 [20].

China has achieved a substantial progress in combatting with HIV and AIDS. For instance, AIDS incidence showed a plateau after 2013, which might imply a near-future decrease of AIDS cases with the persistent expansion of availability of highly active anti-retroviral therapy (HAART) [21]. Also, the control of HIV and AIDS epidemic in Henan, Xinjiang, Guangxi and Yunnan might be an indication for the effectiveness of preventive strategies and measures after the SARS outbreak, and these areas used to be the “hot-spots” of HIV and AIDS in China [22].

In the first two decades of HIV and AIDS era in China, Henan, Guangxi, Yunnan and Xinjiang had high HIV and AIDS prevalence [23], but had different transmission modes. After dramatically cracking down the illegal blood trade in Henan [24, 25], HIV and AIDS incidence showed the lowest relative change there. Guangxi and Yunnan are close to the “Golden Triangle” in Burma, where intravenous drug use was once the major source of HIV transmission, but unprotected sex was found to be a main source of HIV transmission recently [26, 27]. In this study, Guangxi and Yunnan had a relatively slow increasing trend for both HIV infection and AIDS incidence, which might ascribe to substantial targeted endeavors combating HIV and AIDS in the last decade. A similar changing pattern was observed in Xinjiang, where the HIV and AIDS incidence was high in 2004, but the relative increase was low during the study period.

However, it should be noted that some new HIV and AIDS “hot-spots” including Sichuan and Chongqing have appeared recently according to our analyses. Additionally, Inner Mongolia, Qinghai and Shaanxi showed great relative increases in the HIV and AIDS incidence. We should pay much more attention to the prevention and control of HIV and AIDS in these provinces.

There were also substantial changes in HIV and AIDS incidence associated with age. Men and women aged 20–34 years had the lowest relative increase, while those aged 55 years or above had the highest relative increase. The results suggested the effectiveness of measures that focused on young adults but also indicated a potential upsurge of HIV and AIDS epidemic among older people. Globally, previous evidence has suggested a considerable burden of HIV and AIDS among older adults [28–30]. Thus, it is important to further investigate the risk factors of HIV infection and to prioritize the prevention and control of HIV and AIDS among older adults.

Surprisingly, an increased mortality of HIV and AIDS was detected in the present study. We speculate that the increase of HIV and AIDS mortality may be partially explained by the accumulation of AIDS cases, since the cumulative AIDS-related mortality rates significantly increased over time after diagnosis [31]. Meanwhile, the inadequate provision of treatment services and difficulty with adherence were also likely to contribute to the increased mortality, particularly before 2003. Therefore, the accumulation in HIV infections and improved survival time among AIDS patients could result in an increasing burden of HIV and AIDS [32, 33].

Some limitations of our study should be mentioned. First, since the data were retrieved from a passive surveillance system, there might be some under reporting, especially during earlier years of the system. Second, the incidence could also be underestimated because of ascertainment bias by self-selection that individuals at high risk of HIV and AIDS were more reluctant to screening. Third, the increase of HIV and AIDS reporting incidence among older adults might be ascribed to the detection of long-standing infections, though more investigations should be warranted in the near future. Finally, key affected populations (e.g. the men who have sex with men) have not been particularized in our study due to the inaccessibility of corresponding surveillance data.

Estimation of the incidence of most infectious diseases is challenging, because infection might have occurred several years before symptoms arise or a diagnosis is made [34, 35]. Fortunately, the surveillance data can serve as good proxy to quantify the temporal trends of infectious diseases. The China Information System for Disease Control and Prevention (CISDCP) is currently the largest web-based surveillance system in the world, and it stores the nationwide validated reporting data daily. Despite these challenges, our analysis is based on a large sample of people diagnosed with HIV and AIDS across 31 provinces and over 11 years, which strengthens the reliability of our findings.

We used a longitudinal surveillance dataset spanning 11 years in China to investigate changes in the epidemiological characteristics of HIV and AIDS after SARS outbreak. HIV and AIDS incidence showed a significant increasing trend in the last decade, but the epidemic has been well controlled among provinces where the HIV and AIDS incidence were high, and among young adults. However, the major findings also highlight the unmet need for HIV and AIDS prevention efforts and call for a beforehand measure to prevent the emergency among certain provinces and elderly people.

Acknowledgements

Not applicable.

Funding

This work was supported by the National Natural Science Foundation of China (grant numbers: 81772170, 81502870); the National Key Research and Development program of China (grant number: 2017YFC0907002, 2017YFC0907501, 2017YFC211700); the key basic research grants from Science and Technology Commission of Shanghai Municipality (grant number: 16JC1400500); the International S&T Cooperation Program of China (grant number: 2015DFE32790); and Shanghai Municipal Science and Technology Major Project (2017SHZDZX01).

Availability of data and materials

The incidence and mortality data on HIV and AIDS in China covering 31 provinces from 2004 to 2014 were collected from the Chinese Public Health Science Data Center (http://www.phsciencedata.cn).

Authors’ contributions

TZ, YC and XC contributed to the study design; OS, QY and QF contributed to the data collection; ZL, OS and JZ contributed to the data analyses, interpretations and writing of the manuscript. All authors contributed to the manuscript proof. All authors read and approved the final manuscript.

Ethics approval and consent to participate

This study was undertaken with the retrospective analysis of data collected from the Chinese Public Health Science Data Center, and the data used in the analysis were anonymized and no additional contact was made with patients to obtain further information as a part of this study, therefore, no ethical approval was required.

Consent for publication

Not applicable.

Competing interests

The authors declare that they have no competing interests.

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Appendix

Fig. 6

The HIV and AIDS incidence in China in 2004 and 2014

Fig. 7

The incidence of HIV and AIDS in each province stratified by regions in China from 2004 to 2014. (a: HIV incidence in China at province level; b: AIDS incidence in China at province level)

Fig. 8

The HIV and AIDS mortality in China in 2004 and 2014

Fig. 9

The relative change of mortality rate of HIV and AIDS in China at provincial level from 2004 to 2014

Table 4

The relative change of mortality rate of HIV and AIDS in China at province level from 2004 to 2014

Province

Mortality in 2004

Mortality rate in 2004 (/10^5)

OR

95%CI

P value

All

741

0.0570

1.29

1.18

1.40

< 0.001

Beijing

71

0.0135

1.23

1.15

1.32

< 0.001

Tianjin

0

0

1.19

1.16

1.23

< 0.001

Hebei

27

0.0088

1.24

1.08

1.42

0.0067

Shanxi

37

0.0060

1.07

1.02

1.12

0.013

Inner Mongolia

8

0.0126

1.24

1.12

1.38

0.002

Liaoning

15

0.0192

1.35

1.26

1.44

< 0.001

Jilin

16

0.0338

1.35

1.28

1.42

< 0.001

Heilongjiang

14

0.0133

1.29

1.23

1.36

< 0.001

Shanghai

25

0.0299

1.17

1.09

1.25

0.001

Jiangsu

35

0.0304

1.25

1.21

1.29

< 0.001

Zhejiang

28

0.0213

1.31

1.23

1.40

< 0.001

Anhui

6

0.0031

1.17

1.09

1.25

< 0.001

Fujian

52

0.0584

1.20

1.10

1.31

0.002

Jiangxi

34

0.0560

1.19

1.14

1.24

< 0.001

Shandong

31

0.0153

1.15

1.11

1.20

< 0.001

Henan

1315

0.2022

1.07

0.96

1.19

0.206

Hubei

248

0.1598

1.15

1.09

1.21

< 0.001

Hunan

9

0.0689

1.33

1.24

1.44

< 0.001

Guangdong

205

0.0629

1.29

1.18

1.40

< 0.001

Guangxi

341

0.1091

1.53

1.35

1.73

< 0.001

Hainan

4

0.0123

1.49

1.24

1.79

0.0011

Chongqing

34

0.0383

1.51

1.35

1.67

< 0.001

Sichuan

56

0.0252

1.53

1.35

1.73

< 0.001

Guizhou

5

0.0078

1.56

1.27

1.90

0.001

Yunnan

298

0.2411

1.37

1.20

1.57

< 0.001

Tibet

0

0

1.09

1.06

1.15

< 0.001

Shaanxi

17

0.0219

1.34

1.20

1.50

< 0.001

Gansu

11

0.0383

1.27

1.15

1.39

< 0.001

Qinghai

7

0.0185

1.26

1.22

1.30

< 0.001

Ningxia

0

0

1.22

1.18

1.26

< 0.001

Xinjiang

18

0.0269

1.64

1.37

1.97

< 0.001

Table 5

The relative change of mortality rate of HIV and AIDS in each age group in China from 2004 to 2014

age group

Mortality in 2004

Mortality rate in 2004 (/10^5)

OR

95%CI

P value

Male

1 to 4

3

0.0505

1.05

1.03

1.07

< 0.001

5 to 9

5

0.0080

1.10

1.08

1.12

< 0.001

10 to 14

4

0.0061

1.17

1.15

1.18

< 0.001

15 to 19

4

0.0076

1.19

1.16

1.22

< 0.001

20 to 24

21

0.0438

0.98

0.97

1.00

0.072

25 to 29

70

0.1162

1.02

1.00

1.04

0.033

30 to 34

106

0.1622

1.04

1.03

1.06

< 0.001

35 to 39

102

0.1817

1.08

1.06

1.10

< 0.001

40 to 44

82

0.1941

1.09

1.07

1.11

< 0.001

45 to 49

36

0.0819

1.08

1.05

1.11

< 0.001

50 to 54

31

0.0945

1.08

1.06

1.11

< 0.001

55 to 59

22

0.0914

1.07

1.04

1.10

< 0.001

60 to 64

14

0.0655

1.07

1.05

1.10

< 0.001

65 to 69

8

0.0456

1.07

1.05

1.10

< 0.001

70 to 74

5

0.0402

1.07

1.04

1.10

< 0.001

75 to 79

0

0

1.07

1.04

1.09

< 0.001

80 plus

0

0

1.08

1.05

1.11

< 0.001

Female

1 to 4

3

0.0096

1.05

1.03

1.07

< 0.001

5 to 9

2

0.0048

1.10

1.09

1.12

< 0.001

10 to 14

4

0.0067

1.17

1.15

1.18

< 0.001

15 to 19

4

0.0080

1.17

1.13

1.21

< 0.001

20 to 24

14

0.0300

0.99

0.97

1.01

0.3653

25 to 29

36

0.0628

1.03

1.01

1.06

0.006

30 to 34

46

0.0743

1.06

1.04

1.08

< 0.001

35 to 39

48

0.0906

1.09

1.07

1.12

< 0.001

40 to 44

20

0.0513

1.10

1.07

1.13

< 0.001

45 to 49

16

0.0385

1.09

1.05

1.12

< 0.001

50 to 54

20

0.0656

1.09

1.05

1.12

< 0.001

55 to 59

7

0.0313

1.06

1.02

1.11

0.010

60 to 64

5

0.0250

1.07

1.03

1.11

0.003

65 to 69

1

0.0058

1.08

1.04

1.12

0.002

70 to 74

1

0.0076

1.08

1.03

1.12

0.003

75 to 79

0

0

1.08

1.04

1.12

0.002

80 plus

0

0

1.08

1.04

1.12

0.002

Table 6

The annual average annual percentage change (AAPC) of HIV and AIDS reporting incidence (RI) at province level from 2004 to 2014

Province

AAPC in HIV RI

NO. (95% CI)

AAPC in AIDS RI

NO. (95% CI)

all

46.63(39.60,54.01)

20.57(-0.28,45.77)

Beijing

147.72(110.96,190.89)

19.10(0.30,41.43)

Tianjin

32.77(26.79,39.04)

8.86(-0.03,18.55)

Hebei

11.21(7.41,15.15)

2.86(-0.20,6.02)

Shanxi

16.01(10.88,21.37)

3.53(-1.09,8.36)

Inner Mongolia

21.87(15.70,28.37)

2.67(-0.30,5.72)

Liaoning

48.83(34.92,64.18)

8.16(-0.07,17.07)

Jilin

22.82(12.82,33.71)

7.98(0.52,15.98)

Heilongjiang

27.90(18.92,37.55)

5.80(0.17,11.74)

Shanghai

31.74(15.58,50.17)

18.80(1.11,39.59)

Jiangsu

31.83(23.62,40.59)

9.46(0.11,19.68)

Zhejiang

48.81(41.75,56.23)

15.29(0.90,31.72)

Anhui

14.08(6.97,21.66)

7.94(-1.55,18.33)

Fujian

34.19(21.69,47.97)

7.78(0.61,15.45)

Jiangxi

25.97(17.85,34.65)

10.12(0.20,21.03)

Shandong

11.35(7.77,15.05)

2.01(-0.07,4.14)

Henan

9.33(0.54,18.89)

3.81(-10.34,20.20)

Hubei

21.84(14.15,30.04)

8.98(-0.02,18.79)

Hunan

35.62(26.70,45.16)

21.15(0.08,46.66)

Guangdong

22.10(2.44,45.54)

18.22(-0.63,40.64)

Guangxi

111.12(-3.85,363.55)

180.62(-3.28,714.22)

Hainan

27.20(17.94,37.19)

10.71(-0.29,22.92)

Chongqing

241.88(170.14,332.67)

51.08(1.99,123.80)

Sichuan

283.60(215.28,366.71)

61.17(2.05,154.52)

Guizhou

114.41(67.61,174.28)

33.31(-0.38,78.40)

Yunnan

88.25(8.93,225.32)

123.90(-1.14,407.08)

Tibet

27.84(20.80,35.30)

2.63(-1.38,6.80)

Shaanxi

37.19(24.99,50.57)

7.85(0.06,16.24)

Gansu

17.47(11.90,23.32)

3.93(-0.08,8.11)

Qinghai

46.85(32.59,62.65)

10.04(-0.14,21.27)

Ningxia

28.86(21.83,36.30)

5.49(-0.37,11.70)

Xinjiang

228.15(27.38,745.38)

79.93(-7.84,251.29)

Table 7

The average annual percentage change (AAPC) of HIV and AIDS reporting incidence in each age group from 2004 to 2014

Age group

AAPC in HIV RI

NO. (95% CI)

AAPC in AIDS RI

NO. (95% CI)

1 to 4

5.79 (0.00,11.93)

2.71 (0.51,4.96)

5 to 9

4.61 (1.91,7.38)

2.12 (0.49,3.78)

10 to 14

0.78 (0.45,1.12)

0.40 (−0.29,1.11)

15 to 19

24.45 (17.49,31.83)

6.76 (2.90,10.76)

20 to 24

60.06 (40.85,81.89)

28.14 (13.20,45.05)

25 to 29

75.35 (19.60,157.10)

61.30 (28.23,102.89)

30 to 34

80.53 (31.84,147.21)

82.41 (42.28,133.85)

35 to 39

56.80 (36.34,80.34)

62.72 (34.71,96.55)

40 to 44

50.36 (43.08,58.00)

49.90 (28.89,74.33)

45 to 49

50.08 (41.38,59.31)

45.32 (32.90,58.90)

50 to 54

44.83 (29.59,61.86)

40.75 (20.70,64.13)

55 to 59

47.61 (36.81,59.25)

42.10 (26.14,60.09)

60 to 64

61.19 (49.18,74.17)

51.79 (32.37,74.05)

65 to 69

70.77 (55.94,87.00)

56.32 (32.97,83.78)

70 to 74

63.51 (49.86,78.40)

47.27 (29.78,67.10)

75 to 79

49.70 (40.50,59.51)

31.66 (20.64,43.70)

80 plus

34.71 (24.19,46.12)

16.94 (11.66,22.46)

Table 8

The average annual percentage change (AAPC) of AIDS reporting mortality (RM) at province level from 2004 to 2014

Province

AAPC in AIDS RM

NO. (95% CI)

All

9.87 (8.60,11.15)

Beijing

1.97 (1.52,2.41)

Tianjin

2.25 (1.78,2.72)

Hebei

1.15 (0.67,1.63)

Shanxi

1.54 (0.66,2.43)

Inner Mongolia

0.92 (0.51,1.33)

Liaoning

2.52 (1.78,3.26)

Jilin

3.90 (2.75,5.07)

Heilongjiang

2.03 (1.63,2.43)

Shanghai

1.39 (0.96,1.83)

Jiangsu

2.65 (2.03,3.28)

Zhejiang

3.19 (2.71,3.66)

Anhui

3.34 (2.45,4.24)

Fujian

2.53 (1.33,3.75)

Jiangxi

3.70 (3.24,4.17)

Shandong

0.63 (0.46,0.80)

Henan

9.64 (−2.30,23.05)

Hubei

3.79 (2.94,4.64)

Hunan

11.00 (9.52,12.51)

Guangdong

7.93 (6.76,9.12)

Guangxi

103.49 (71.17,141.90)

Hainan

7.27 (6.12,8.44)

Chongqing

18.05 (14.34,21.88)

Sichuan

22.59 (18.48,26.84)

Guizhou

14.34 (11.83,16.91)

Yunnan

49.13 (41.35,57.33)

Tibet

1.08 (0.30,1.87)

Shaanxi

2.29 (1.76,2.82)

Gansu

1.50 (0.99,2.02)

Qinghai

3.38 (1.65,5.13)

Ningxia

2.50 (2.01,2.99)

Xinjiang

35.99 (28.49,43.93)

Table 9

The average annual percentage change (AAPC) of AIDS reporting mortality (RM) by age groups from 2004 to 2014

Shao B, Li Y, Yu L, Wang K, Chang M, Wang B, et al. The HIV/AIDS epidemic characteristics in a northeast province of China--men who have sex with men have made a tremendous contribution to the growth of the HIV epidemic. J Inf Secur. 2014;68(3):273–80.Google Scholar